Power transmission



2 Sheets-Sheet J. M. L. FERRARI Povmn TRANSMISSION Original Filed M ay25, 1926 n x 1. x

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UNITED STATES PATENT OFFICE.

JEAN MARIE LAURENT FERRARI, F TOULON, FRANCE.

POWER TRANSMISSION.

Original application led May 25, 1926, Serial No. 111,518, and in FranceDecember 11, 1925. Divided and this-application filed April Theinvention concerns a movement governor with progressive variationcomprising a power transmission between a driving and a driven shaftlying in the same axis. Said transmission enables a transmission ofpower at rariable speeds allowing a progressive change of the speed, areversing of the moving direction of the driven shaft and even a.stopping of the latter, the members of the io transmission remainingalways in mesh.

An embodiment of the object of the invention is shown by way of exampleon the accompanying drawings, wherein Fig. l shows an axial sectionthrough the driving and driven shaft of a transmission of power atvariable speeds allowing a progressive change of the speed, reversingthe movement or stopping the rotary motion of the driven shaft.

Fig. 2 is a perspective view of the transmission shown in Fig. 1, aportion of the structure being broken out to show the details ofconstruction.

Fi 3 shows a detail i. e. parts of two pinions and some slidinglyarranged blades in mesh with the teeth of both pinions.

Fig. lshows a detail, to wit a ring with a crown and a nave kepttogether by curved spokes and openings between said spokes, crown andnave receiving blades in juxtaposition to each other withoutinterruption.

Fig. 5 shows a modified form of the detail shown in Fig. 4l, the spacebetween crown and nave being partially filled with blades injuxtaposition to each other, one part being in section. the other partin front view, from which it may be seen, that the spokes do not hinderthe blades of forming a closed ring .without any interruption.

Fig. 6 is a section along the line 1-1 of Fig. 5, the blades beingomitted.

Fig. 7 shows different blades of Fig. 5 in elevation. A driving shaft ilies in line with a driven shaft li/ and is provided at its end with anave 13 surrounding the Vend of tho driven shaft next to the end of thedriving shaft. This nave 13 forms a spherical hollow chamber,surrounding a bevel pinion 4t fixed at the end 'of the driven shaft ,i/and two bevel pinions 8 in mesh with pinion 4.

12, 1928. serial No. 269,445.

Said bevel pinions 3 are supported by a spindle 15 rectangularly fittedto the driving sha-ft z'. The nave of each bevel pinion carries a pinion16 and the pinion 16 gearing with the orbit gear 17 of the nave b ofring a-b carrying blades p, p2, p3, p5 slidably arranged between crown aand nave b in the direction indicated by a double arrow in Fig. 2parallel to the'axis of the shafts a', y. Two ball lbearings arearranged between nave 12 and ring a-b. Furthermore the nave 13 carriestwoflanges 13 perpendicular to the axis -of the shafts z', y. Eachflange is provided at the circumference of its surface turned away fromthe ring vfL-b with teeth, thus forming a gear wheel 14, each being inmesh with two pinions 2. Each pair of pinions 2 is slidably on a shaft 6supported by a bearing 18, one of said bearings being mounted on thedriving shaft z', and the other on the nave 12. The bearings are notdriven by the shaft The naves of pinions 2 carry each at its outer end agear 2,'each nave being mounted on a. ball bearing 7 acting as a screwnut on the screw threade`d shaft -6. Each screw nut 7 slides on a railprovided on the frame h, thus hindering a rotating of the screw nut butenabling a displacement along the threads of sha-ft 6. At both ends ofeach shaft 6 is fixed a gear u n wheel 5 at each end in mesh with a gearwheel 19. By turn-lng one of said gear wheels 19 a displacing of thepinions 2, that is to say, a sliding of its teeth along the teeth ofgear wheels 14 is produced.

The driving shaft z'. integral with nave 12, drives, by means of theteeth 14 the pinions 2 integral with the gear wheels 2, which in turn,gear with the slidably arranged blades p, p2, p3 and p5, thus drivingthe ring a. The latter now drives by means of its orbitgear 17 pinions16 integral with the bevel pinions 8, which are driving the bevel pinion4 on the driven shaft.

s shown in Fig. 7 the blades have rounded edges.V As shown in Figs. 2andV 5 the blades are arranged in juxtaposition to another withoutinterruption forming a closed ring. As can be seen from Fig. 3 the teethof the gears 2 reproduce themselves exactly in said crown of slidingblades in order to rotate the closed ring of blades.

The special form of the blades makes possible, without interference bythe spokes, the provision of a closed ring of slidable blades capable ofprojecting over the flanges 11 screwed on the crown a according to theposition of the teeth .of the gear wheels 2 in mesh with the blades.

As can be seen from Figure 7 each blade y? has two opposite notchescorresponding with the ribs of crown a and nave 6. First these bladesare brought into the opening between crown and nave ion the right place.rihe blades p2 having each a central opening corresponding to the crankportion of the spokes shown in Fig. are now brought into position, thuscarried by the crank portion of the spokes. Finally the blades p3 havingtwo opposite projections and the blades p having only one projection aremounted between crown and nave and are maintained in position by theprotruding parts of the flanges 11 screwed on the crown a. The crankedshape of the spokes allows the blades and p2 to completely cover themthus forming a closed ringlining the ring a-Z If the ring a-b rotates,the points of the blades near to their outer circumference will have ahigher inear speed as the points of the blades near to their innercircumference thus according to the position of the gear wheels 2relatively to the blades a higher or lower speed may be derived from thepinions 2.

Supposing the gearing ratio of the dif- -ferent wheels is so calculated,if the pinions 2 engage with the central port-ion of the blades p, p2,p3, p5, the difference between the speed of the cr wn a and thedrivingshaft c' causes the pinion 16, driving the orbit gear 17 torevolve at such a speed that for each complete revolution of thedrivingshaft 'L' the bevel pinion 3 will not drive the bevel pinion ell,the driven shaft y/ will not rotate, though all parts of thetransmission are in mesh, and the driving shaft 'a' is revolving at anyspeed whatever.

If by means of the gear wheels 5 and 19, the pinions 2 are pushed towardthe crown a, the latter will revolve at a reduced speed and will drivethe pinions 1G and 3 slower, so that said pinion 3 will push the bevelpinion 4iof the driven shaft y in the same direction as the drivingshaft z'.

If the pinions 5 are so vactuated that-the gear wheels 2 are pushedtowards the nave the latter will revolve at a higher speed thus drivingthe pinions 16 and 3 quicker, so that said pinion 3 will push the bevelpinion 4i of the driven shaft 1/ in a direction opposite to that of thedriving shaft i.

It may be seen from the foregoing that it is possible to graduallyincrease or reduce the speed of the driven shaft to stop the latter orto reverse its motion notwithstanding all members of the transmissionbeing in mesh.

That I claim is:

1. In a power transmission the combination of a driving sha It, a drivenshaft in line with the latter, a circular mem er concentric to saidshafts, a pinion in mesh with said circular' member, a .gear cooperatingwell with the driven shaft with the circular member and fixed to thedriving shaft, the circular member being rotatably journaled andcontaining a plurality of radially arranged movable blades injuxtaposition and forming a closed ring, a rotatably mounted piniondriven by the driving shaft and slidably arranged along its own axis thelatter perpendicular to the axis of the shafts, said pinion in mesh withthe movable blades, means for moving said pinion relatively to theblades so as to bring it in Contact with a more or less greater pitchcircle on said blades of the circular member, and means for keeping thelining parts of said blades always in cooperation with the teeth of saidpinion and const-raining said lining parts to follow the circumferenceof teeth and gaps of the pinion.

2. iin a speed change gear the combination of a driving shaft, a drivenshaft in line with the latter, a ring shaped rotatably journaled housingconcentric to said shaft, a plurality of radially arranged movableblades in juxtaposition and forming a closed ring, said blades beingslidable in an axial direction and lining the housing on two .surfacesperpendicular to the shafts, two opposite pinions, one at each side ofthe housing' in mesh with the lining parts of the blades, the axis ofboth pinions being perpendicular to the axis of the shafts and lying inone plane, means for moving both pinions together along their axisrelatively to the lining parts of the blades, said pinions driven by thedriving shaft, and a gear cooperating as well with the driven shaft aswith the housing and fixed to the driving shaft.

3. In a power transmission the combination of a driving shaft, a drivenshaft in line with the latter, a ring shaped rotatably journaled memberconcentric to said shafts, a pinion cooperating with lsaid ringshapedmember, a gear cooperating as well with the driven shaft as with theringshaped 'member and journaled in the driving shaft, the ringshapedmember being constituted by a crown and a nave connected together' bycurved spokes, a plurality of radially arranged blades in juxtapositionbeing slidable in an axial direction, lodged between crown and nave,wholly embracing said spokes, said bladesforming a closed ring,Y withlining parts in a plane'perpendicular to the shaft, a rotatably mountedpinion driven by the driving shaft and slidably arranged along its ownaXis the latter perpendicular to the aXis ot' the shafts, said pinion inmesh with the movable blades, means ttor moving said pinion relativelyto the blades so as to bring it in Contact with a more or less greaterpitch cirele on said blades ot' the circular member, and means forkeeping the lining parts of said blades always in cooperation with theteeth of said 10 pinion and constraining said lining parts to follow thecircumference of teeth and gaps of the pinion.

In testimony whereof I have signed my name to this speciiication.

JEAN MARIE LAURENT FERRARI.

